13664061 has 12 divisors (see below), whose sum is σ = 20061340. Its totient is φ = 8959680.

The previous prime is 13663999. The next prime is 13664069. The reversal of 13664061 is 16046631.

13664061 is a `hidden beast` number, since 13 + 6 + 640 + 6 + 1 = 666.

13664061 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 13461561 = 450^2 + 3669^2 .

It is not a de Polignac number, because 13664061 - 2⁶ = 13663997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11896 + ... + 12993.

Almost surely, 2^13664061 is an apocalyptic number.

It is an amenable number.

13664061 is a deficient number, since it is larger than the sum of its proper divisors (6397279).

13664061 is a wasteful number, since it uses less digits than its factorization.

13664061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24956 (or 24953 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 13664061 is about 3696.4930677603. The cubic root of 13664061 is about 239.0708344397.

The spelling of 13664061 in words is "thirteen million, six hundred sixty-four thousand, sixty-one".